Gas–Liquid Cold Plasma for Synthesizing Copper Hydroxide Nitrate Nanosheets with High Adsorption Capacity

A facile, fast and environmentally friendly gas-liquid plasma method for synthesizing Cu-2(OH)(3)NO3 nanosheets is reported for the first time. The preparation process just takes 12 min using Cu(NO3)(2) aqueous solution without any other chemical agents. The Cu-2(OH)(3)NO3 nanosheets exhibit much higher methyl orange (MO) adsorption capacity (428.8 mg MO g(-1)) than that prepared by the solvothermal method (212.8 mg MO g(-1)).